What We Collect
Nothing. CalcHarbor has no accounts, no sign-in forms, no comment sections, and no input fields that transmit anywhere. Every value you enter into a calculator is processed by JavaScript running inside your own browser tab and discarded the moment you close or reload the page. There is no database on the receiving end because there is no receiving end.
What the Host Sees
This site is served as static files from Cloudflare Pages. Like any web host, Cloudflare's infrastructure processes standard technical request data, including IP addresses, browser user-agent strings, and requested URLs, for security and delivery purposes. That processing is governed by Cloudflare's own policies, and none of it involves reading anything you type into a calculator. CalcHarbor does not add analytics scripts, session recorders, fingerprinting code, or advertising tags of any kind on top of that baseline.
Cookies and Local Storage
The site sets no cookies and writes nothing to local storage or session storage. Returning visitors are treated as first-time visitors every time, which is exactly how it should work for a calculator.
Third Parties
Pages embed no third-party fonts, icon libraries, scripts, frames, or widgets. The stylesheet loads from this domain alone. External links, where present in editorial text, lead to other independent sites with their own separate practices; following them is entirely your choice and this site receives no information about whether you do.
Children
The tools here are appropriate for all ages, and since no data is collected from anyone, none is collected from children either. Schoolwork questions, allowance math, and birthday countdowns are all welcome cargo.
Your Rights
Privacy regulations such as the GDPR and CCPA grant rights to access, correct, export, and delete personal data. Those rights are trivially satisfied here: there is no personal data held about you, so there is nothing to access, correct, export, or delete. Requests or questions can go to harbor@calcharbor.example, though the honest answer will always be that the shelves are empty.
Changes to These Notes
If the site ever adds a feature that changes this picture, such as optional saved preferences, these notes will be updated before that feature ships, and the change will be described plainly at the top of this page. Until then, the promise stands as written: computed locally, remembered nowhere.
Last reviewed: August 2026.